No supported authentication methods available

Error:

Disconnected: No supported authentication methods available (server sent: publickey,gssapi-keyex,gssapi-with-mic)

No supported authentication methods available

Receiving error When trying to access Linux server through putty or other tool using ssh service.

Solution:

  1. Edit /etc/ssh/sshd_config configuration file using vi editor.
        [[email protected] ~]# vi /etc/ssh/sshd_config
  2. Check and replace with yes for below entry
     PasswordAuthentication no

    changed 

    PasswordAuthentication yes
  3. save and exit from the file using :wq
  4. Than restart the ssh service using below command.
    systemctl restart sshd
  5. Restart the network service using below command.
    systemctl restart network
  6. Now try to access the server and sure it will work. Still if you are facing error in accessing the server, that there might be issue with firewall configuration.

Reference: Super user

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